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Betting those are Chinese-made tires — they apparently don’t vulcanize the rubber correctly, so it tends to crack prematurely; I’d guess that’s why it gets shattery at such temperatures. In my experience, down at least to -60F (-51C) American-made tires don’t crack. (I’ve also had American-made tires still good, with no cracks, at over 50 years old, while Chinese-made tires usually start cracking by 5 years or so.)

BTW since this site went to some local video format, I can no longer play videos here. Why not just embed from Youtube?

Howdy from South Alberta, er, Montana It can be tough finding American-made tires right here in America (but they cost no more than Chinese junk!) — I don’t know what options you get up your way but I’d guess Russians have a choice of 1) Chinese tires or 2) way too expensive.